Transient response optimization in variably loaded electrohydraulic servomechanisms

In this paper, a triple-mode control strategy is adopted in order to provide a near optimal stable transient response. The design of the controller is discussed, and its applicability is proven on an analog simulation. The controller´s use in an experimental rig consisting of an inertially loaded electrohydraulic control system is described. Analog and experimental results are given and show that as loading increases, stability is maintained, cavitation is avoided, and response time is minimized. These results are shown to be a significant improvement over those from the system operated proportionally.